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  • Title: [Vitamin D dependency and vitamin D resistance].
    Author: Takeda E, Yokota I.
    Journal: Nihon Rinsho; 1993 Apr; 51(4):977-83. PubMed ID: 8387122.
    Abstract:
    Vitamin D dependency is classified into two clinical disorders which are caused by genetic defect of vitamin D metabolism. Vitamin D dependent rickets type I and type II are the deficiency of 25-hydroxyvitamin D-1 alpha-hydroxylase and the defect of receptor for 1 alpha,25-dihydroxyvitamin D, respectively. In contrast, vitamin D resistance shows hypophosphatemia derived from disorder(s) of phosphate transport system in renal brush border membrane. There are three clinical entities such as hereditary hypophosphatemic rickets with hypercalciuria, familial hypophosphatemic rickets and oncogenic hypophosphatemic osteomalacia. However, the real pathogenesis of these disorders have not well been understood at present.
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